09Terms consent checkbox

<main class="stage">
  <div class="consent-card is-demo">
    <label class="consent">
      <input class="consent__input" type="checkbox">
      <span class="consent__box">
        <svg class="consent__svg" viewBox="0 0 20 20" aria-hidden="true">
          <path class="consent__check" d="M4 10.5l4 4 8-9" pathLength="1" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
        </svg>
      </span>
      I agree to the Terms and Privacy Policy
    </label>
  </div>
</main>

@use "../../../../site/static/demo-tokens" as *;

$duration: $dur-base;                                  // 체크 선이 그려지는 시간
$easing: $ease-out;
$color: $subject-blue;                                 // 체크·테두리 색

@include stage($stage-ink);

.consent-card {
  width: min(240px, 88vw);
  padding: $sp-4;
  border: 1.5px solid #e6e2d8;
  border-radius: $r-card;
  background: $stage-paper;
  transition: border-color $duration $easing;
}
.consent {
  display: flex;
  align-items: flex-start;
  gap: $sp-2;
  font-size: 12px;
  line-height: 1.5;
  color: $stage-ink;
  font-family: inherit;
  cursor: pointer;
}
.consent__input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.consent__box {
  flex: 0 0 auto;
  width: 20px; height: 20px;
  border-radius: $r-xs;
  border: 2px solid #c9c2b2;
  color: $color;
  display: grid;
  place-items: center;
  transition: border-color $duration $easing;
}
.consent__svg { width: 14px; height: 14px; }
.consent__check {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset $duration $easing;
}
.consent__input:checked ~ .consent__box { border-color: $color; }
.consent__input:checked ~ .consent__box .consent__check { stroke-dashoffset: 0; }
.consent__input:focus-visible ~ .consent__box { outline: 2px solid $color; outline-offset: 2px; }
.consent-card:has(.consent__input:checked) { border-color: $color; }

.consent-card.is-demo .consent__box { animation: box-cycle $dur-loop $easing infinite; }
.consent-card.is-demo .consent__check { animation: check-cycle $dur-loop $easing infinite; }
.consent-card.is-demo { animation: card-cycle $dur-loop $easing infinite; }

@keyframes card-cycle {
  0%, 20%   { border-color: #e6e2d8; }
  45%, 100% { border-color: $color; }
}
@keyframes box-cycle {
  0%, 20%   { border-color: #c9c2b2; }
  45%, 100% { border-color: $color; }
}
@keyframes check-cycle {
  0%, 20%   { stroke-dashoffset: 1; }
  45%, 100% { stroke-dashoffset: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .consent-card, .consent__box, .consent__check { transition: none; }
  .consent-card.is-demo,
  .consent-card.is-demo .consent__box,
  .consent-card.is-demo .consent__check { animation: none; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.consent-card {
  width: min(240px, 88vw);
  padding: 16px;
  border: 1.5px solid #e6e2d8;
  border-radius: 16px;
  background: #ffffff;
  transition: border-color 300ms ease-out;
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12px;
  line-height: 1.5;
  color: #17141a;
  font-family: inherit;
  cursor: pointer;
}

.consent__input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.consent__box {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 2px solid #c9c2b2;
  color: #2f6df6;
  display: grid;
  place-items: center;
  transition: border-color 300ms ease-out;
}

.consent__svg {
  width: 14px;
  height: 14px;
}

.consent__check {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 300ms ease-out;
}

.consent__input:checked ~ .consent__box {
  border-color: #2f6df6;
}

.consent__input:checked ~ .consent__box .consent__check {
  stroke-dashoffset: 0;
}

.consent__input:focus-visible ~ .consent__box {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.consent-card:has(.consent__input:checked) {
  border-color: #2f6df6;
}

.consent-card.is-demo .consent__box {
  animation: box-cycle 2s ease-out infinite;
}

.consent-card.is-demo .consent__check {
  animation: check-cycle 2s ease-out infinite;
}

.consent-card.is-demo {
  animation: card-cycle 2s ease-out infinite;
}

@keyframes card-cycle {
  0%, 20% {
    border-color: #e6e2d8;
  }
  45%, 100% {
    border-color: #2f6df6;
  }
}
@keyframes box-cycle {
  0%, 20% {
    border-color: #c9c2b2;
  }
  45%, 100% {
    border-color: #2f6df6;
  }
}
@keyframes check-cycle {
  0%, 20% {
    stroke-dashoffset: 1;
  }
  45%, 100% {
    stroke-dashoffset: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .consent-card, .consent__box, .consent__check {
    transition: none;
  }
  .consent-card.is-demo,
  .consent-card.is-demo .consent__box,
  .consent-card.is-demo .consent__check {
    animation: none;
  }
}

import { useState, type CSSProperties, type ChangeEvent } from "react";
import styles from "./ConsentCheckbox.module.scss";

export type ConsentCheckboxProps = {
  label: string;
  /** 체크 선이 그려지는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  color?: string;
  onChange?: (checked: boolean) => void;
};

/** 실제 input[type=checkbox] 을 감춰 쓴다 — 스크린리더·키보드는 그 checkbox 를 그대로 읽고 조작한다 */
export default function ConsentCheckbox({
  label,
  duration = 300,
  easing = "ease-out",
  color = "#2f6df6",
  onChange,
}: ConsentCheckboxProps) {
  const [checked, setChecked] = useState(false);
  const style = { "--duration": `${duration}ms`, "--easing": easing, "--color": color } as CSSProperties;
  return (
    <div className={styles.card} data-checked={checked} style={style}>
      <label className={styles.consent}>
        <input
          className={styles.input}
          type="checkbox"
          checked={checked}
          onChange={(e: ChangeEvent<HTMLInputElement>) => {
            setChecked(e.target.checked);
            onChange?.(e.target.checked);
          }}
        />
        <span className={styles.box}>
          <svg className={styles.svg} viewBox="0 0 20 20" aria-hidden="true">
            <path className={styles.check} d="M4 10.5l4 4 8-9" pathLength={1} fill="none" stroke="currentColor" strokeWidth={2.4} strokeLinecap="round" strokeLinejoin="round" />
          </svg>
        </span>
        {label}
      </label>
    </div>
  );
}